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Kim, Seul-Ong,Thangaraju, K,Jung, Sungouk,Lu, Wanxiang,Park, So Min,Lee, Jonghee,Lee, Jeong-Ik,Chu, Hye Yong,Kim, Yun-Hi,Kwon, Soon-Ki American Scientific Publishers 2012 Journal of Nanoscience and Nanotechnology Vol.12 No.5
<P>We developed highly efficient phosphorescent organic light emitting diodes (PHOLEDs) using iridium(III) complex, fac-tris[4-methyl-2-2(4'-trimethylsilylphenyl)pyridine] [Ir(msippy)3]. PHOLEDs based on Ir(msippy)3 complex exhibit the yellowish-green emission with CIE color coordinates of (0.31,0.64). These device performances were compared with those of the green emitting Ir(ppy)3-based devices. The higher external quantum efficiency (EQE) of 25.6% and the current efficiency of 84.4 cd/A were achieved for Ir(msippy)3-based device. The results show that the complete energy and/or charge transfer from the host to Ir(msippy)3 dopant in the emitting layer (EML) of the device resulted in the higher device efficiencies compared with those of Ir(ppy)3-based devices.</P>
導入 機器의 效率的 活用을 위한 敎授-學習 敎材의 開發 : 8 個 學科 共同 硏究
李昌甲,孟琦錫,李載元,朴萬植,廷吉煥,金鍾悟,朴景采,李英浩,李東周,邕章祐,柳盛淵,趙澤東,姜理錫,李殷雄,李興浩,金健中,韓相玉,金良模,張錫明,朴俊灝,洪鳳植,金太均,金再韓,宋海永,盧載星 충남대학교 공업교육연구소 1982 論文集 Vol.5 No.1
In this study, through the combined effort and collaboration of 8 engineering education departments, teaching-learning processes and models were reviewed, and printed and bound student manuals developed on 120 different tasks and subjects. Audio-visual supportive material, already in use in laboratories, was added to form a complete teaching-learning package. In addition to promoting the maximum use of the newly acquired equipment, this study will also contribute to the development of laboratory practice, the in-service training of technical high schools teachers and help in the development of their own instructional program.
Okada, Yukinori,Kim, Kwangwoo,Han, Buhm,Pillai, Nisha E.,Ong, Rick T.-H.,Saw, Woei-Yuh,Luo, Ma,Jiang, Lei,Yin, Jian,Bang, So-Young,Lee, Hye-Soon,Brown, Matthew A.,Bae, Sang-Cheol,Xu, Huji,Teo, Yik-Yin Oxford University Press 2014 Human Molecular Genetics Vol.23 No.25
<P>Previous studies have emphasized ethnically heterogeneous human leukocyte antigen (HLA) classical allele associations to rheumatoid arthritis (RA) risk. We fine-mapped RA risk alleles within the major histocompatibility complex (MHC) in 2782 seropositive RA cases and 4315 controls of Asian descent. We applied imputation to determine genotypes for eight class I and II HLA genes to Asian populations for the first time using a newly constructed pan-Asian reference panel. First, we empirically measured high imputation accuracy in Asian samples. Then we observed the most significant association in HLA-DRβ1 at amino acid position 13, located outside the classical shared epitope (<I>P</I><SUB>omnibus</SUB> = 6.9 × 10<SUP>−135</SUP>). The individual residues at position 13 have relative effects that are consistent with published effects in European populations (His > Phe > Arg > Tyr ≅ Gly > Ser)—but the observed effects in Asians are generally smaller. Applying stepwise conditional analysis, we identified additional independent associations at positions 57 (conditional <I>P</I><SUB>omnibus</SUB> = 2.2 × 10<SUP>−33</SUP>) and 74 (conditional <I>P</I><SUB>omnibus</SUB> = 1.1 × 10<SUP>−8</SUP>). Outside of HLA-DRβ1, we observed independent effects for amino acid polymorphisms within HLA-B (Asp9, conditional <I>P</I> = 3.8 × 10<SUP>−6</SUP>) and HLA-DPβ1 (Phe9, conditional <I>P</I> = 3.0 × 10<SUP>−5</SUP>) concordant with European populations. Our trans-ethnic HLA fine-mapping study reveals that (i) a common set of amino acid residues confer shared effects in European and Asian populations and (ii) these same effects can explain ethnically heterogeneous classical allelic associations (e.g. <I>HLA-DRB1*09:01</I>) due to allele frequency differences between populations. Our study illustrates the value of high-resolution imputation for fine-mapping causal variants in the MHC.</P>